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TELEPHONE Boom. FILED JULY 9, 1921. 3 SHEETS-SHEET 1 FILED JULY 9. 1921 mmmm 0. GULLICKSEN. TELEPHONE BOOTH.

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DIE GUIiLIC-IKSEN, OI CHICAGO, ILLINOIS, ASSIGIIUIt CHURCHILL CABINET- CUMFAIIY, OI CHICAG-U, ILLINOI$, A CUJRJEORA'IION OF ILLINOIS.

' rntnrnoirn noo'rn.

Application filed July 9,

To all whom it may concern;

Be it known that l, 0m: GULLIoKsnN, a citizen of the United States, residing at Chicage, in the county of Cook and State of Illinois, have invented certain new and use-- ful Improvements .in Telephone Booths, of which the following is a full, clear, concise,

and exact description, reference being had 1 points of door support are mutually com-.

pensating-so far as lost motion between moving parts is concerned;

Third: A normally open telephone booth comprising a door that may be closed and opened with ease and without inconvenience. by a person within (or without) the booth, but which, when in open position, will not readily close under accidental impact from the outside,

Fourth: A telephone booth of the normally open type comprising a door which, although intended to be closed and opened from within the booth, may, if occasion requires, be easily pushed open from the outside by oneunfamiliar with the operation of the door, despite the fact that the occupant of the booth may have fainted and thrown the weight of his body against the inside of the door;

Fifth: A telephone booth which has a door mounted on moving pivots, the pivot devices and the guides therefor being so constructed and arranged that the door and several walls of the booth may be assembled and disassembled with great facility.

Sixth: A telephone booth comprising a platform, top panel, and four side walls, one of which acts as the frame of the door, combined with a minimum amount of apparatus for controllingthe movement of the door;

ital. e l-m1 Ilo. itatat.

door which operates within a very small area inside the booth;

Eighth: A telephone booth comprising a. door that is mountedby and upon certain novel hardware which is particularly char-v acterized by its simplicity and rugged construction.

These and other objects and advantages of the telephone booth of the construction of my invention will more fully hereinafter appear.

In the drawings:

Figure 1 is atop plan view of the booth of my invention, a portion of the top panel being broken away, revealing the door in its normally open position;

Figure 2 is a vertical transverse section taken on the line 2-2 of Figure 1, looking in the direction of the arrows;

Figure 3 is a vertical detail section taken on the line 33 of Figure 1;

Figure 1 is a vertical detail section taken on the line 4-4: of Figure 1;

Figure, 5 is a detail horizontal section taken on the line 5*5 of Figure 2; and

Figure 6 is a. perspective view of the booth with the rear and a side panel thereof re moved and showing the.d0or in its closed position.

The booth comprises a platform 10, back wall 11, side walls 12 and 13, front wall 14:

which comprises a frame within which is supported, the door 15, and a top panel 16. The sides of the booth are secured to one another and to the top panel by screws 1717 and with the aid of tongue and groove construction which furnishes added rigidity and insures a more sound proof booth. Two tapering side rail supports 18 and 19 are secured in any suitablemanner, preferably by wood screws, to the side wall 12, support 18' being somewhat below the top of the door and support 19 somewhat above the bottom of the door. As shown in Figures 1 and 3, support 18 is of l.- shaped cross section, the leg of the l. remaining of constant size, while the vertical part varies in thickness with the taper increasing in the direction of the door frame.

Each of the rails 20 and 21 is preferably formed of a strip of sheet metal, the upper portion being bent back upon itself longitudinally at 20 to form a head portion for the rail which projects part way over the I projection of its support. These rails aresecured to the supports in any suitable' t manner, as by screws 22-22. Each of the carria es 23-23 which ride upon the rails 20 an 21 is in the form of an angole bracket, tone late 24. of which is bentack upon itselt? forming a short leg 25 of a U-shaped hanger. An anti-friction roller 26 is pivoted .on the in 27 which passes between the parallel I egs of the. hanger at such height that the roller rides upon the head of the guide rail. An an larly disposed longi tudinal portion 28 o the leg 25 passessome what under the short leg of the iris rail, thuspreventing accidental upwar displacement of .the carriage withreference' to the guide. At the outer end of the other plate 29 of the angle-bracket is a pintle 30 which unites plate'n29 with another plate 31 which is secured to the inside of the door at the left end (Figure 6). The angle bracket ofthe carriage and the plate 31 thus form leaves .ofa hinge which supports the left end of the door. The pivot 30 of the hinge, it will be noted from Figure jl, is spaced from thefguide. rail a dlstanoe somewhat greater than the thickness of the door. The guide rails 20 and 21 and their supports 18 and 19, as well as the carriages which ride- .thereon, are in all'respects the same. As 30 stated, the side. guide rails 20 and 21 and their supportsare supported wholly upon the side wall 12 of the booth.

Secured to the top rail of the door frame 14 is another tapering rail support 32 which is approximately of the same length but has a, greater angle of taper than the su ports 18 and '19.- A top guide rail 33, simllar to i the side guide rails 20 and 21, is secured to the support 32 upon which is slidablymountthe upper end of which isbent over to form a short leg 36 of a U-shaped hanger, be-

" tween the legs of which is mounted an 'anti-' friction roller 37 by means of a pivot pin 38.; A small horizontal shelf 39'is bent up from the lower portion of plate 35 and a horizontal lug 40 1s struck out of the central portion of late 35, the two-lugs being equi ped wit holes to form spaced bearings or a pintle 41. v i

Secured to the top rail of the door 15 a considerable distance in toward the center from the right end (Figure 6) is an angle bracket 42, the horizontal offset portion of whichextends into the booth and is given a U-shaped turn at its end, forming the spaced bearings 43 and 44 which fit snugly over the spaced lugs'39 and 40 of the carriage 34. This allows a pivotal connection between the do ir and the carriage 34 of the top guide rai From the description thus far, it will be a parent from Figure 1 that the path of t e left end of the .door will be along the linev a--a parallel to the guide rail 20, but spaced ed a carriage 34 comprising a side plate 35,

therefrom and at an angle to the side wall 12. The ivot, 41 of the carriage 34 of the front gui e rail 33 travels in a path indicated by line b-b and spaced from and parallel to the front guide rail 33, but at an angle to the front wall 14. It is clear then that the position of the door at all times is determined by the location of the pivots 30 and 41 on the lines (Zr-G, and b-b. Although the door of the telephone booth of my invention is normally open, for the sake of clearness I shall describe the opera tion of opening the door by reference to Figures 1 and 6. By grasping a suitable hand rail 45 secured to the inside of the door, the operator, by a push to the left- (Figure 6), combined with a little pull inward, (or as might better be described as a slightly arcuate swing of the hand) causes the left end of the door, 'as governed by the 85 pivots 30, to swin into the booth along the path aa, while the midportion of the door travels toward the side of the booth and somewhat inward, as governed by the path b-J), until the outside of the door abuts the left upright rail of the door frame (Figures 1 and 2). As indicated by the dotted lines, the right end of thedoor describes a substantially elliptical path. By placing the front and side guide rails at an angle to their respective side walls 12 and 14 of the booth, the intersecting paths aa and bb are caused to form an obtuse angle. By making this angle considerably more than 90 degrees, asshown in the drawings, I have 100 eliminated to a considerable degree the necessity for a twisting motion of the hand rail 45 the operator in opening and closing the cor as compared with that which would be required were the paths aa and 10! 6-1) at right angles.

By the use of my improved construction, the space inside the booth which is cut oil during the opening and closing of the door is reduced to a very small fraction of the 110 area of the booth, this fraction being located entirely in the far corner from the telephone. In this way the occupant is not in the least discommoded by the door projecting into the booth in closing. The line 0-0 of Fig- 11$ ure 1 indicates the points beyond which the door does not pass in opening and closing.

It is known to all who are familiar with the operation and maintenance of booth telephones that especially in warm weather 120 the lack of ventilation 1n telephone booths releases so that the ship lap edges of the door will closely mate similar ship lap edges in the side of the door frame, and also to prevent undue strain on the other guide members through the careless operation of the door,

it have provided an auxiliary floor guide for the right end of the door. This floor guide comprises a rail member 46 in the form of an angle strip which is secured to the top of the bottom rail of the doorframe extending from one side of the frame to the other and serving alsoas a threshold plate.

which 'extends down and around the downwardly projecting portion of the angle strip 46, the portion 48 being bent back upon plate 53 upon the slide 47, the plate 53 being secured to the bottom of the bottom rail of the door in any suitable manner, such as by the screws 5454. From Figures 1 and 6 it will be noted that the pivot 52 is located somewhat nearer the right end of the door thanthe upper pivot 41, this difference being approximately equal to the width of the front rail support 32 at the point occupied by pivot 41 in Figure 1.

llt is apparent that this third pivot/po nt 52 will travel in a path as indicated by the line ale-d of Figure 1 spaced a slight distance-from and parallel tothe transversely extending guide rail 46 and, hence, parallel to the front wall of the booth.

While in theory-the position of the pivot 52 would always be determined by the positions of the pivots 30 and 41 upon their" respective paths aa and b,?) and hence the pivot 52 would travel in a path which would be substantially a portion of an ellipse, as indicated by the line 6-0 of Figure 1; still the straight line d,d, as will be seen from an inspection of Figure 1, approximates the elliptical curve e-e with but comparatively small divergence and A sliding member 47 is mounted upon the rail 46, the forward part 48 of thus the inevitable lost motion in the guides 23 upon the sidera-ils and the guide 34 on the front top rail 33, together with the lost motion of the slide 47 on. the threshold rail 46, will allow of enough movementout of the theoretical path ee to permit the moving partsto slide with sufiicient freedom for an easy operation offlthe door. The fact that the pivot 52 travels somewhat out of itstheoretical path insures a certain rigidity of the parts at all times by absorbingthe lost motion, which would not be possible were-the guide rail 46 curved as line ee rather than a Straight strip. By placing the rail 46 along the threshold of the door frame, it is not necessary to have any grooves or indentations in the floor of the booth, thus leaving no room for-dust and dirt to collect which would clog the working parts, and also allowing the booth to be swept out thoroughly with great ease.

The ease of assembly and disassembly, which is asalient feature of my invention, is quite apparent when it is considered that the side guide rails 20 and 21 and their sup ports 18'and '19 are supported by and secured to the side wall 12 only; that the upwalls of the booth, as well'as the platform and top panel, are secured together only by the screws 1717. Thus all'that is necessary in order todisassemble the booth for transportatlon is to remove these screws -1717, the tongue and groove fit of the walls then being easily pulled apart, and

the guide carriages 23-23 being disassociated from the guide rails 20 and 21 on the side wall 12 by lifting the door- 15 with its frame 14 in reference to the side wall 12. In this way the door 15 can be transported while held in its closed position within the door frame, or, if preferred, the pivot pins 41 and 52 may be driven out and the doortaken from its frame 14 and transported as a separate 'unit.

From Figure 1 it will be noted that, al-

though one edge of the door extends out from the booth in its normally open position, it would be difficult for one in passing the booth to so move the projecting edge of the door that the door would be closed 210- v cidentally, while atv the same time a person within the booth could close the door with a simple pull and with great case.

What I claim is new and desire to secure by Letters Patent of the United States is 1. A telephone booth comprising a plurality of vertical walls, one of which constitutes a door frame, a door, means for limiting the movement of a point on the upper edge of the door to a straight path oblique to and adjacent the front wall of the booth,

means for limiting the movement of a oint on the lower edge of the door which is orizontally displaced from the first point, to a line substantially parallel with and adjacent the front wall of the booth, and means for limiting one of the lateral edges of the door tomovement in a straight line adjacent'the' inner surface of a lateral wall' of the booth.

2. A telephone booth comprising a-plurality of verticallwalls, one-of which constitutes a door frame, a door,-'means for guiding the movement of a point on the upr edge ofthe door along a straight path ying adjacent the front wall ofthe booth, means for guiding the movement of a oint on the lower edge of'the door, which is ori- I v zontally displaced fromthe first point,

along a path substantially parallel with the front wall of. the booth said last-mentioned path lying 'without the vertical plane' of said .first-mentioned- 'path and means for guiding one of the lateral edges of the door for movement in a straight line adjacent the inner surface ofa lateral wall'of the booth. 3. A telephonebooth comprising a plurality of vertical walls, one of which constitutes a doorfframe, a. door, means for guiding one oft-he lateral edges of the door for movement in a straight path ad acent a lateral wall of ithe booth, means for guiding movement of a point'on the upper edge of.

V v the door along a path adjacent the front Wall of the booth, and means" for'guiding a point on thelower edge of the door, which is horizontally displaced from the first mentioned point, along a straight line closely approximating the theoretical path in which members spaced vertically apart and dis- 1 posed substantially opposite the top andbottom of the door, and supported adjacent one of said lateral walls, reciprocating means for guiding a point at-thetop of the door tioned point as woul be determined b the before mentioned points, said last ment1oned means comprising a horizontal guide member adjacent the frontwall of the booth but not in the same vertical guide members.

5. A telephone booth comprising a lurality of-vertical walls, the front wal of whichbonstitutes a door frame, a door, means for limiting the movement of a point plane as the other adjacent the lateral edge of the door to a I .path adjacent -'one of t e contiguous walls, means for limlting the movement of a point adjacent the upper edge of the door to a I path adjacent the front wall'of the booth, one of Ashe two hereinbefore-mentionedmeans being disposed obliquely -to its associated wal1,'and a threshold guide limiting the movement of a point adjacent the lower edge of the door and horizontally displaced from said second mentioned oint to a path substantially parallel to the ront wall.-

6. A telephone booth. comprising a plurality of vertioal walls, a door,-means for guiding themovement of a lateral edge of the door along a path adjacent a, wall contiguous to the front wall, means for guiding a point adjacent the upper edge of the door along a path adjacent the front wall, a

threshold guide strip of angular cross section, the offset ortion of which is turned downwardly at t e outer edge of the strip, a horizontally disposed slide member recipro- 7 cable on said strip and having a hook portion passing around the lower edge of said offset portion, said slide member being pivoted to the dooradjacent its lower edge.

"In witness whereof, I hereunto subscribe my name this 29th day of June, 1921.

1 a QLE GULLICKSEN. Witnesses: EDNA V. GUSTAFSON,

EMILE J Bounonors. 

